Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 180gr | Norma Semi Soft Point bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,825 psi | 87% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 57,450 psi | 90% | 2943 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 54,375 psi | 85% | 2992 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 55,100 psi | 86% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,433 psi | 85% | 2940 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 55,840 psi | 88% | 2995 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,630 psi | 73% | 2822 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,510 psi | 65% | 2779 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,376 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,534 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,709 psi | 87% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 57,653 psi | 90% | 2986 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,651 psi | 87% | 2992 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,594 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2966 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,261 psi | 90% | 3058 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,607 psi | 86% | 2972 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 57,580 psi | 90% | 2894 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,182 psi | 76% | 2894 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 55,651 psi | 87% | 2992 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 56,376 psi | 88% | 2887 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,343 psi | 80% | 2913 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 82% | 57,580 psi | 90% | 2913 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 55,477 psi | 87% | 2940 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,607 psi | 86% | 2897 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 55,840 psi | 88% | 2936 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,723 psi | 86% | 2917 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,824 psi | 86% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,285 psi | 80% | 3025 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 55,883 psi | 88% | 2976 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,912 psi | 58% | 1824 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,375 psi | 85% | 2871 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,346 psi | 85% | 2858 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,070 psi | 85% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,956 psi | 89% | 2920 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 98% | 57,261 psi | 90% | 3031 fps | 98.5% |
| Lovex S065 | <<locked>> | 86% | 54,998 psi | 86% | 2861 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,536 psi | 89% | 2904 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2864 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 55,288 psi | 87% | 2927 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 55,317 psi | 87% | 3012 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,782 psi | 87% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,157 psi | 85% | 2992 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 54,694 psi | 86% | 2930 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,333 psi | 88% | 2986 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 59% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 57,305 psi | 90% | 2900 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,013 psi | 86% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 57,435 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,564 psi | 87% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 3022 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 84% | 57,682 psi | 90% | 2894 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,753 psi | 87% | 2907 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 57,130 psi | 90% | 2972 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 86% | 56,376 psi | 88% | 2887 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,998 psi | 86% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,536 psi | 89% | 2904 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,477 psi | 87% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,667 psi | 90% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,317 psi | 85% | 2812 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,681 psi | 89% | 2969 fps | 99.2% |
| Somchem S355 | <<locked>> | 84% | 57,421 psi | 90% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 57,551 psi | 90% | 2904 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 55,912 psi | 88% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 57,609 psi | 90% | 2946 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 55,027 psi | 86% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 57,725 psi | 90% | 2917 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,130 psi | 90% | 2923 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 88% | 56,898 psi | 89% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 55,303 psi | 87% | 2943 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,230 psi | 87% | 3005 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2982 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,203 psi | 90% | 2874 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,695 psi | 87% | 2943 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,679 psi | 84% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 57,638 psi | 90% | 2940 fps | 99.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,561 psi | 51% | 2454 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 43,816 psi | 69% | 2717 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 47,253 psi | 74% | 2861 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 51,822 psi | 81% | 2799 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 39,189 psi | 61% | 2641 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 45,658 psi | 72% | 2808 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 98% | 43,685 psi | 68% | 2759 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 34,229 psi | 54% | 2592 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 53,011 psi | 83% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,872 psi | 66% | 2720 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,298 psi | 76% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 39,015 psi | 61% | 2635 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,726 psi | 62% | 2690 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,169 psi | 49% | 2484 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 31,053 psi | 49% | 2497 fps | 95.7% |
| Alliant Reloder-26 | 71.2 gr | 80% | 33,794 psi | 53% | 2608 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 39,334 psi | 62% | 2680 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 53,867 psi | 84% | 2841 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 42,105 psi | 66% | 2772 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 39,726 psi | 62% | 2690 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,688 psi | 73% | 2723 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 41,901 psi | 66% | 2726 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,896 psi | 84% | 2858 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 45,440 psi | 71% | 2762 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 48,124 psi | 75% | 2782 fps | 98% |
| Hodgdon H4831 | <<locked>> | 88% | 45,658 psi | 72% | 2756 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,906 psi | 75% | 2799 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,581 psi | 62% | 2608 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,898 psi | 58% | 2697 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 44,817 psi | 70% | 2785 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 43% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,264 psi | 66% | 2651 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,153 psi | 75% | 2749 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,655 psi | 65% | 2661 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 44,469 psi | 70% | 2697 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 90% | 43,801 psi | 69% | 2782 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 45,643 psi | 72% | 2700 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 43,947 psi | 69% | 2684 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 31,894 psi | 50% | 2438 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 42,018 psi | 66% | 2684 fps | 96.1% |
| Norma MRP | 70.9 gr | 82% | 36,318 psi | 57% | 2641 fps | 96% |
| Norma URP | <<locked>> | 80% | 42,931 psi | 67% | 2703 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 43,511 psi | 68% | 2789 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 41,785 psi | 65% | 2694 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 36,129 psi | 57% | 2602 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 44% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,548 psi | 84% | 2841 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,242 psi | 80% | 2890 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,555 psi | 68% | 2733 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,916 psi | 66% | 2746 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 36,085 psi | 57% | 2674 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 50,647 psi | 79% | 2785 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 43,250 psi | 68% | 2680 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 38,305 psi | 60% | 2618 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 46,688 psi | 73% | 2723 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,643 psi | 72% | 2700 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 43,947 psi | 69% | 2684 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,938 psi | 81% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,111 psi | 80% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,701 psi | 70% | 2648 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,971 psi | 60% | 2615 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 50,604 psi | 79% | 2782 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 47,166 psi | 74% | 2730 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 39,856 psi | 62% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,463 psi | 57% | 2549 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 48,370 psi | 76% | 2707 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,512 psi | 70% | 2703 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 38,377 psi | 60% | 2585 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 43,816 psi | 69% | 2703 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 35,041 psi | 55% | 2562 fps | 98.7% |
| Vihtavuori N560 | 76.1 gr | 88% | 45,049 psi | 71% | 2818 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 94% | 44,802 psi | 70% | 2799 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,424 psi | 68% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,629 psi | 72% | 2769 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,644 psi | 43% | 2477 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 84% | 38,174 psi | 60% | 2585 fps | 95% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 82 powders for .300 Weath. Mag. loaded with the .308 | 180gr | Norma Semi Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 3,058 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,058 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 180gr | Norma Semi Soft Point they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Baschieri & Pellagri 109, IMR 8133 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.